[Amps] Home-brew ceramic insulators?

[R.Measures]

•   I bought 50-lbs of porcelain clay and I tried making porcelain 
pottery.  The shrinkage factor is about double ordinary stoneware clay, 
and porcelain clay is hellish to work with.  My advice is use G-10 
fiberglass-epoxy for insulating.  It's good around RF, strong, and easily 
drilled/machined.  

>My YL has a ceramics business, and I started thinking about trying to 
>manufacture my own ceramic (porcelain) insulators. Has anyone tried this?
>
>73  Mike  N6MZ